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ARM: dts: stm32mp1: add pull-up on serial rx of console connected to STLINK

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Avoid U-Boot auto-boot interruption for line break detection
on console when the RX line connected to STLINK is floating
(-IO error in getc cause by framing error and testc return 1)
Same workaround is applied on all the STMicroelectonics board.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2019-07-30 19:16:18 +02:00 committed by Patrice Chotard
parent 9c2214b489
commit 7acda7eae5
2 changed files with 4 additions and 0 deletions
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2
arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi
View File

@ -189,6 +189,8 @@
};
pins2 {
u-boot,dm-pre-reloc;
/* pull-up on rx to avoid floating level */
bias-pull-up;
};
};

2
arch/arm/dts/stm32mp157c-ed1-u-boot.dtsi
View File

@ -206,5 +206,7 @@
};
pins2 {
u-boot,dm-pre-reloc;
/* pull-up on rx to avoid floating level */
bias-pull-up;
};
};